Combined type-writing and computing machine



F. A. HART.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLKCATION FI'LED OCT. 9.1917.

Patented Sept. 9, 1919.

3 SHEETS-SHEET l..

W/f/vesses; WOW W he F. A. HART. I COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED OCT. 9. I917 1 ,3 1 5, 303. Patented Sept. 9,1919.

3 SHEETSSHEET 2.

Mknessea- W APPLICATION FILED OCT. 9. 1917.

Patented Sept. 9, 1919.

3 SHEETSSHEET 3-v FREDERICK A. HART, 0F NEWARK, NEW JERSEY, ASSIGN'OR TO UNDERWOOID COMPUT- ING MACHINE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEVJ YORK.

COMBINED TYPE-WRITIN G AND COMPUTING MACHINE.

Application filed October 9, 1917.

T 0 all whom it may concern Be it known that I, FREDERICK A. HART, a citizen of the United States, residing in Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Combined Type-Writing and Computing Machines, of which the following is a specification.

This invention relates to an improvement in combined typewriting and computing machines of the Underwood addendagraph type, and is illustrated in connection with the mechanisms disclosed in the applications of Frederick A. Hart, Serial No. 7 0,898,filed January 8, 1916 (now Patent No. 1,285,150, dated November 19, 1918,), Henry L. Pitman, Serial Nos. 24,390, H4,825 and 176,303, filed April 28, 1915, January 27, 1917, and June 22, 1917, respectively, and Arthur A. Johnson, Serial No. 112,645, filed August 2, 1916.

In this form of machine, the numeral keys supply the power not only for operating the type-actions, but also for operating the computing mechanism, and there are various safeguards, in the form of locks and shifting devices. The burden of these safeguards on the numeral keys renders their action slow and heavy. It is, hence, desirable to relieve the numeral keys of this extra work when not actually computing. Provision is made, therefore, for disconnecting portions of the computing mechanism from the numeral keys when not actually in a computing zone. Further provision is made for throwing all of the computing mechanism out of action when it is desired to merely typewrite, and not compute. This improvement includes a control of the locking means for the numeral keys, which prevents more than one numeral key from being operatedat a time, and which insures that each numeral key completes its up-anddown stroke before the operation of another numeral key. This locking mechanism for the numeral key is controlled from the type-writer carriage by a stop corresponding to the computin zone, so that this looking mechanism will e out of operatlon when not in a computing zone, and will be brought into operation when in the computing zone. This enables a more rapid operation of'the numeral keys, as, in ordinary typewriting without interlocks, the actions of the numeral keys when rapidly operated overlap Specification of Letters Patent.

Patented Sept. 9, 1919..

Serial No. 195,526.

each other. When computing, the overlapping of the action of the numeral keys is not desired, on account of the possibility of error; hence, the .need of throwing in the numeral-key-interlocks when in a computing zone.

The numeral keys in this form of machine are also called upon to shift the driving gear or rack, driven by the numeral keys and connected to drive the master wheel, into and out'of driving mesh with the train which it drives. This is done at each stroke of a numeral key, and is controlled, in the present invention, so as to remain out of action until a computing zone is reached.

The numeral keys may be entirely disconnected from the computing mechanism by a manually-operated arrangement, which is also connected to throw out the control from the carriage of the numeral-key-interlocks and the driving rack-shifting mechanism, so that these will not be operated in or out of a computing zone when the computing mechanism is silenced.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a vertical section, from front to rear, with parts omitted to simplify the showing, and illustrating the actuator as gisconnected from the valuating or indexing ail.

Fig. 2 is an enlarged detail view of the full-stroke locking mechanism, illustrating the same in its silenced position.

Fig. 3 is a skeleton, perspective view, showing the control from the carriage of the interlocks and the full-stroke locks for the numeral keys, and the lock for preventing the operation of the rack-shifting mechanism. In this view, the carriage 1s shown as in a non-computing zone, so that the looking mechanism for the numeral keys is si-,

operates idly without operating the actuator and he li'acleshi'ftiifrig mechanism.

a is a detail View of the numeral-keyinterlock "for preventing more than one hit-- meral key being operated at a time. This locking mechanism is shown in its inactive conditiom correspoinlm to being out 0* computing); Zoniu or else to a silenced (303 tion of the computing: mechanism,

Fig. '2' is a skeleton section, taken. from front to 1' ar. showing one of the computing Zone-controlling stops as in action, rende inn; the 't'ull-stmke nnmeral-key-locl; e1 tire. the inter-numeral-key-lock ei ec and the :-;lii'ttil1 1' mechanism tor the (l i rack eitl'ectii'e.

llelerrin; more particularly to the separate parts of the invention. nume all keys 1 and alphabet keys :2 depress lQPjJ-lQVQtL 2:3, to rock bell- -ranks 4-. so as to swing type hars it up rearwardly against the trout side of a platen 13, mounted to rotate in a carriage 'Z, The carriage 'i'is controlled in its step-by- .step movements by an escapement mechanism of the usual l nderwood type. IChis includes rack 8. pirotally mounted on the carriage l1 and normally engaging a pinion i connected by a one-w; y pawl-and atche't mechanism, not showin to the esrapcment wheel 10. The escapement wheel is controlled in its step by step movements by lined and loose dogs 11 and 12, pivoted to :swing" back and forth and ope. 'ated by a unirersal t' 'ame ll on a rocker .lhe universal tran e llis operated at the depression of an ot' the keys 1 and '1 by heels 17 provided.

he typebars 5.

on each of i ln addition to having step-liy-step ine' movements. the c: rriag'e i has t in ino'i'elllcnts to jump from one major column or computing; zone to iillOillQill This includes tuoulatine keys 1th which, when le pressed rock ke \'-le .'ers 1'? to raise pinn- 55ers 1H,. indiriduallyr into the path of stops 1th adjust-ably mounted alone; a 1'; cl; :20 carried by the carriage 7. it the operation o1 any of the tabulating kejis l8 Pnllltlg" 'l' is eleased from the escapemed' mechanism by raising; he rack tl out of ineih the pinion 9. This; is done by a lever 2 universal to notches 2; provided on each 0 the plungers 1?. The lever 2i, when rock d a l \L' L i I 1 7 draws down on a link 23 to rock lever 21:,

its front end carrying at a roller '25 linden lying the rack 8'. The etops 1) determine rarious AOHQS or major c ilin ms of the typewriter cin'riage 7, Some of these zone; may he solely for the purpose of typewritin: and others may for 7;} purpose well typewriting. lie. the the stops nry be single, as ii (lie in 2-3; and. in the latter case 101 computing: the stops may be double as indicated 341 in his; 3 the latter {nice the M i stop 2 1 s prevnw with 1 wietui 01 ch .explained at this point.

the centputingz zone. which has a function scribed hereinafter.

The numeral keys 1. in addition to controlling; typewriting operations. actuate a computing mechanism to compute the digits as t \'pewritten. For this purpose. each of the numeral keys l is profioed with a Valliating or indexing; plate 29, which, in the case ot' the numeral keys from 1 to 9, are each prm'ided with a cam slot 30, arranged to operate bail 31, universal to the cam slots. The cam slots are of gr; led pitch or throw incr asinp; from a minimum for the 1" key to a lllaXlIIlulll for the "'9" numeral key. so as to giro the bail 31 variably increasing extents of movements. corresponding to the values of the numeral keys operated. This forms an indexing or valuating mechanism which translates the equal movements of the nuinc al keys into variable, driving movements of the bail 31, to corre spend with the digital values of the numeral keys actuated.

The bail 31 drives an actuator 32, when connected thereto. The actuator 32. in turn, draws down on a link 33. to thrust forward a driving rack Ill The driving ark Ell. as more fully explained in the application, Herial No. 2%,390, above-meationed. is brought into mesh with a gear 35 of a train of gears Ilil, so as to drive the same an amount corresponding to the nine of the numeral key actuated. This train of gears 3 drives a mastewheel 3?, whicln when in any particular computing zone, (lliYes the computing wheels of a t-otalizer 39, connected to the carriage l" at a point corresponding to that particular zone. in this way, the rallies of the numeral kejfs operated are run into the totalizei- I? step by step as the are typewritten on the work-sheet carried by the platen The rack 3% is shifted in and out.- or mesh with the gear 3:) from the numeral keys 1. so that they not only drive the rack Bl but control its driving relation with the gear 35 and the train of {gears to the. master wheel ill". This is done directly in a manner more particularly descrihed in the application t lerial No. B l-3W) 2tl)()\'tllltlltl(metl but briefly The driving! rack til is shifted into and out of mesh by a parallel linkage all) which is connected to be operated by a link ll. l 'he link -1 i.-; operated by a bell-c 'ank l2 when the former is connected for operation by the latter. 'lhe bell-crank $2 is connected to he ope 'ated by an arm 43 on the rocker 13. 1t will be rennunhered that the rocker 13 is operated ioy the universal frame 1% and the type-liars 5 at the operation of each of the keys 1 and '2.

The connection between the hell-(rank l2 and the link ll is such, however, that the aeration humeral keys alone can cause the bell-crank 12 to operate the link 41. and thus shift the rack 34. For this purpose, there is pivotally mounted on the link +1 a lever -14, which has an L-shaped slot 15, in which is located a pin 46, secured to the bell-crank -12. The pin 16 and the lever 14 form the means of connection between ,the bell-crank 12 and the link 11. Normally, the lever 41 is in such relative position to the link ll that the pin 16 will work idly in the section -17 of the L- shaped slot 45, which extends in parallel. or in the same general direction as the link 11. Thus, when writing with the alphabet keys or with the numeral keys in a non-computing zone. there will be no operation of the link 41 and no shifting of the rack 31.

When a numeral key 1 is operated to effect writing in a computing-zone, however, the lever 4-4 is rocked about its pivot i8, so as to bring the other section 49 of the L- shaped slot 15 into juxtaposition to the pin 416. This forms a rigid connection between the bell-crank 42 and the link 41, so that the driving rack 34 may be shifted relatively to the gear 35, so as to control its driving relation with respect to the same. The shifting of the lever 44: to form a rigid connection between the bell-crank 12-and the link 41 is controlled from the numeral keys 1 themselves. For this purpose, each of the plates 29 isprovided with a cam 50, which engages a cross-bar 51 of a bail 52. The hail 52 is connected by a link 53 to an arm 54. pivotally mounted at 18 and yieldingly connected to' the lever 4-1 by means of a spring The spring enables the shifting of the lever 14; when its movement is not obstructed, so that whenever it is desired to compute and a numeral key is operated, the driving rack 8-1 may be shifted indirectly by the numeral keysthrough the universal frame 1 1 and the rocker 13.

In the present invention, provision is made for locking the lever 4% against a movement tending to come into an effective connecting position when the carriage is not in a computing zone. Under such circumstances, the spring 55 yields idly without a shifting of the lever 414. For this purpose, there is provided on the lever 41 a pin 56 which is engaged by a locking arm 57 when the typewrimr carriage 7 is not ina computing zone. This prevents the lever 44 from being shifted by the numeral keys 1 to a position to form a rigid connection between the bell-crank 12 and the link 41; Under such circumstances, the bell-crank 42 will vibrate idly. when a numeral key is operated Without operating the link 41, and thus without shifting the driving rack 34: relatively to the gear 35.

When a computing zone is reached, and it is desired to control the engagement of J- the driving rack 34: with respect to the driving train 36, then one of the zone-determining stops 2? having a reach :28, comes into register with a computing zone controller 58 and rocks it rearwardly from the Fig. 1 position to the Fig. 7 position. This controller 58, as a whole, is in the form of a double bell-crank lever pivoted at 59. The pivot 59 is a rock shaft and is rocked each time the controller is rocked by one of the computing zone-controlling stops 2?. The controller 58 has a lever 60, which is connected by a link 61 to an arm (3:2 connected to the locking arm 57 by a crank shaft 62*. The lower arm of lever (30 is limited in its rearward movement by a pin -60 in one of the supporting brackets for shaft 59. In this way, the locking arm 57 is moved from the active position of Fig. 1 to the inactive position of Fig. 7. This permits the lever 1-1 to rock when a numeral key is operated in a computing zone, thereby enabling the same numeral key, through the escapement mechanism including the universal frame 1-1, to vibrate the link :1 lengthwise thereof, and thus control the engagement and disengagement oi the rack 31 with the gear 35.

Other parts of the computing mechanism are controlled from the computing zone stop 27, so as to bring them into play solely in a computing zone. and thus have the numeral keys relieved of the work of operating them when not in a computingzone. Among the elements controlled in this manner are the interlocks and full-stroke locks for the numeral keys. Pivotally secured to each of the numeral key levers 3, there is provided a pendant (53. Each of these pendantsutili is provided with a crowding interponent 64 pivoted to the pendant 63 and arranged to thrust itself between adjacent pairs of crowding hangers 135, and 66. The hangers 65 and 66 are L-shaped and pivotally mounted so as to form a continuous series of locking arms extending between limiting pins 67 and 68 (Fig. 6). This series of locking arms has a limited lost-motion or back lash, so as to prevent the operation of more than one numeral key at a time when computing.

When notcoinputing, it is unnecessary to prevent the overlapping of the operation of two numeral keys at a time, asthe operation of two, and sometimes three, type keys can overlap in a rapid operation of the machine; hence, the amount of play or lost-motion in the series of hangers 65 and 66 between the limiting pins 67 and 68 Will amount to at least the thickness of two of the crowding interponents 64 This enables two or more numeral keys to overlap in their action when non-computing without a locking action of one numeral key by the other by preventing the intrusion of an interponent 64; in the series of locking hangers 65 and 66.

fill

all

W hen computing, however, it is desirable that not more than one numeral key shall be operated at a time, as the overlapping of their action might interfere with the accuracy of the computation To prevent more than one numeral key from operating when in a computing zone, there is provided a special intruding interponent 69, which is arranged to be thrust between a pair of the locking hangers 66 and 65, so as to up a part of the lost-motion or play in the series of hangers between the limiting pins 67 and 68. This intruding interponent 69 is of sufiicient thickness to take up enough of the play so that but one of the interponents 64,-, carried by the numeral keys, can enter the series of hangers at a time in this way, when one numeral key is depressed, a second numeral key cannot he depressed, as its interponent 64- Will be blocked in its downward movement the corresponding pair of hangers and 66.

The special crowding interponent 69 is operated from the controller 58, so as to be brought into play when one oi the computing provided with an arm on which the special crowding; interponent 69 is pivotally mounted. The special interponent 69 thus forms a computing zone-controlled interlock for the numeral keys and will only come into play to put this drag on the numeral keys when in a computing; Zone. The computing zone-controlled lock interponent 69 is guided for its vertical movement "by a perforated plate 76, which allows a certain amount of transverse movement, enabling the lock 69 to yield sidewise or lengthwise or the series of hangers 65 and 66, as these hangers must swing to one side or the other a certain amount, according to the location of the particular numeral keyactuated which is taking up the space in the series to prevent the simultaneous operation of any other numeral key.

The numeral keys 1 are provided with full-stroke locks to prevent a partial depression or return ot a numeral key followed by a subsequent operation of the same numeral key. These full-stroke locks are controlled for the: computing zone, so that they need only come into action when computing. Each of the pendants 63 forms part of the full-stroke locking mechanism and is provided with two racks 77 and 78. The rack 7 has upwardly facing" teeth so as to prevent the return of the numeral key until completely depressed, and the rack 76 has downwardly lacing teeth to prevent the depres sion of the numeral key until completely returned. The rack 7'? cooperates with one arm 79 ot a double-acting locking dog, and the rack 78 cooperates with the other arm of this double-acting locking dog.

l hen in a computing zone, the lower arm 79 is within the range of the rack Z7, so that upon the depression of a numeral key, the dog; 79 will click idly over the teeth of the rack 77, providing the latter is fully depressed, H the numeral key should not be fully depressed, the dog 79, by. its engagement with the rack 77, will prevent the return. of the numeral key to its uppermost position until it has been fully depressed. After the numeral key has been fully depressed to complete a combined typewriting and computingaction, the locking dogs 79,

60, will be swung so as to bring the upper arm 80 into the range of movement of the upper rack 78, This is true :tor each oi the dog's i9, 80, of which there is one for each the pendants 63. The dogs 79, 80, for this purpose, are mounted on a rock shaft 61, which has a yielding connection by means of a spring 62 to an arm The arm 83 also has a lost-motion pinandslot connction 8a: with the shaft 8i, and is arranged to rock the shaft so as to shift the upper locking arms 80 into reach of the racirs 8 after the numeral key in action has completed. its down-stroke, The arm is o ated from the escapement mechanism, "vl ch, in turn, is operated in the numeral ey in action at the end of its down-stroke For this purpose, the arm 83 is connected by link 65 a bell-crank d6 (Fig. l). The bell-crank has a lost-motion connection 8? with the link 85, and is yieldingly connected thereto by means of spring 88.

A spring tends to op rate the bell crank 86, so to rock the shaft 81 and bring; the upper locking arrls into range or the rack'sYS, This action is opposed, however, by the loose dog 12 of the typewriter escapement mechanism. The bell-crank 66 is con nected hy a link to a hell-crank ill pivoted on the rocker l and arranged to follow up the loose dog 12 of the escapement mecha- I nisrn. The loose dog lQslips oil" the escapement wheel 10 at the end of the downstrcke of a numeral key when the universal frame 14: is operated, so that the spring 9 is free to operate as the loose dog 12 jumps forwardly to catch the neat tooth or the escapement wheel. This will rock the bell-crank 86 so as to draw on the link 85, and thus rock the shaft 81 to bring the locking arms 80 into range of the racks '28. The numeral key, which has been depressed, can then return and will be forced to return completely before it or any other numeral key can be open ated.

When not in a computing zone, the dogs 7 9, 80 are held in an intermediate inactive position in which neither the arm 79 nor the arm 80 is in engagement with the racks 77' and 7 8, respectively. F or this purpose, there is provided on the rock-shaft 81, which carries the dogs I 9, 80, a neutralizing bell-crank 92, both arms of which are engaged by an arm93 provided on the rock-shaft 74, This rock-shaft 'Zl is connected to be operated by the controller 58,and when not in a computing zone the position of the rock-shaft 7 1 and the arm 93 will be such that the arm 93 is in engagement with the bell-crank 92 and holds the dogs 7 9, 80 in their intermediate inactive position. When in a computing zone, one of the zone-controlling stops 27 will shift the controller 58 tosuch a position asto withdraw the arm 93 from engagement with the bell-crank 92, thereby permitting the rock shaft 81 to assume a normal computing position with the lower arms 79 of the dogs, 7 9, 80, in engagement with the lower racks 77..

When it is desired to disconnect the numeral keys from the computing mechanism,

the actuator 32 may be broken so as to disconnect it from the bail 31. For this purpose, the actuator 32 is formed in two parts pivoted at 94 and connected by a spring 95. The spring 95 normally holds a notch'96 in engagement with a pin 97 on the bail 31. The part 98, provided with the notch 96, may

be depressed against the tension of the spring 95 so as to disengage the notch 96 from the pin 97. For this purpose, there is provided a disconnecting shifter 99 pivoted at 100 and operable from a hand-lever 101;, The handlever 101 has a lost-motion pin-and-slct con nection 102 with a link 103 pivotally connect ed to the shifter 99. Tu this way the shifter 99 may be operated manually to break the actuator 32, and thus disconnect it fnomthe bail 31. Thus, the bail 31 will be operated idly by the numeral keys 1 without operating the actuator and without rotating the master wheel. The shifter 99 may be operated by other means besides the handle 101. One of. these is by means of a link 10 1 connectedto the u-ppencase shifting mechanism of the typewriter, as is more fully explained in the application of Henry L. Pitinan, Serial No, 176,303. It may also be operated fromthe controller 58, so as to normally disconnect the numeral keys from the actuator when not in a computing zone. For this purpose, the link 72 is provided with a pinand-slot connection 105, with the shifter 99. This enables the shifter to be operated to its Fig. lposition, breaking the actuator and disconnecting it from the bail 31 until a computing zone is reached, when'the link '12 will .be shifted to the position of Fig. 7, relieving the pressure on the part 98, and permitting the spring 95 to reconnect the actuator 32 with the bail 31.

The manual disconnector 101 may be used when it is desired to entirely silence the computing mechanism, irrespective of whether the typewriter carriage '2' is in a computing zone or not. In addition to breaking the actuator 32, so as to interrupt the connection between the numeral keys and the 1naster wheel drive, the controller 58 may be withdrawn to a position clear of the computing zone-controlling stops 27. F or this purpose, the double bell-crank lever of the controller 58 has'an arm 106, on which a slide 107 is mounted. This slide 107 has a pinand-slot connection 108 with the arm 106. Normally, when a combined typewriting and computing operation is desired, a cam head 109 is located in the path of the computing zone controlling stops 27. The slide 107', however, can be depressed so as to remove the cam head 109 thereof out of the range of the computing zone controlling stops 27.

The slide 107 is connected to be shifted by the manual lever 101. This connection includes an arm 110 pivotally connected to the slide 10? and secured to a rock-shaft 111 mounted on the arm 106 at one end, and the bell-crank at the other end. This rockshaft 111 is provided with'a second arm 112 connected by a link 113 to the manually-operated lever 101. This mounting causes the silencing bell crank 110, 111, 112, to rock with the controller 58 and silence the same either in its computing or non-computing ,write without computing.

The lost-motion connection 102 permits the operation of the shifter 99 without operating the lever 101. The lost-motion connection 105 permits the operation of the shifter 99 without operating the zone-controlling mechanism. The slide 107 is yieldingly held in its active and inactive positions by a detent 114 engaging in notches 115 provided in the slide 107. The controller, as a whole, is held to its work and returned after a zone-controlling stop 27 has passed by means of a spring 116. a

It will be seen that, when slide 107 has been movedto the position shown in Fig. 4;, spring v116 will hold lever 60 with its lower arm against pin 60, and detcnt 114 will enter upper notch 115 on slide 107, and the combined efi'ect will be ,to hold handle 101 in disengaging position until the next manual operation of said handle.

It is evident then that a number of elenumeral key at a time, a computing zonecontrolling stop carried by said carriage, connections operated by said stop when said carriage is in a computing zone, for rendering said numeral key lock efiective, so that writer carriage and said computing mechanism, a series of pendent interponerits, one for each or said numeral keys, a crowding lock having a lost-motion corresponding to a capacity of at least two of said interponents on said numeral keys, an auxiliary crowding interponent for taking 11 a portion of the lost-motion in said crow irig lock, so as to prevent-the intrusion of more than, one interponent at a time, and thus prevent the operation of more than one numeral key at a time, a computing zone-controlling stop carriedby said carriage, a controller operated by said stop when said carriage is in a computing zone, connected to operate said auxiliary interponent, so as to render said crowding lock efiective, and means for silencing said controller, so as to prevent the bringing into play oii'said lock by said zonecontrolling stop.

12. The combination with a typewriter carriage, of means, including numeral keys, for controlling the action of said carriage, a totalizer, a numeral key-operated driving mechanism for said totalizer, having a point of interruption, enabling effective action solely on one stroke of the numeral key, nu-

. ,meral-key-operated means for making and breaking said driving mechanism at said point of interruption, a lock for preventing the operation of said last-mentioned means, and carriage actuated means for releasing said lock. W

13. The combination with a typewriter carriage, of means, including numeral keys,-

for controlling the action of-said carriage, a totalizer, a driving mechanism for said totalizer operated by said numeral keys, and including a point of interruption, so as to drive said ,totalizer solely on one stroke of the numeral key actuated, numeral-key-actd.

ated means for making and breaking said driving mechanism at said point of interruption, computing zone-controlling means carried by said carriage, and means for controlling the operation of saidmake-and-r break means from said computing zone-controlling means.

14:. The combination with a typewriter carriage, of a totalizer, means, includi numeral keys, for controlling'the action oi? said typewriter carriage, driving connections between said numeral keys and said totalizer, including a point of interruption, a make and break mechanism for said point of interruption operated by said numeral keys, a control for the operation of said make and break mechanism, governed-from said carriage, and silencing means for said control.

15. The combination with a typewriter. carriage, of means, including numeral keys, for controlling the action of said carriage, a totalizer, driving connections for said totalizer operated by said numeral keys, said driving connections having a oint of interruption, enabling the drive ,0 said totalizer solely on one stroke of said numeral keys, a make and break mechanism for said point of interruption, silencing means for said make and break mechanism, a computing zone-controlling stop carried by said carriage, and connections for operating said silencing means from said computing zone controlling stop.

16. The combination with a typewriter carriage, of an escapement mechanism for said typewriter carriage, means, including numeral keys, for controlling the action of said escapement mechanism, a totalirzer, a driving train from said numeral keys to said totalizer having a point of interruption, a make-and-break connection for said point or" interruption, means for operating said makeand-break connection from said escapement' mechanism, connections enabling. said numeral keys to control the operation of said make-and-break connection by said escapement mechanism, and a lock for preventing the operation of said last-mentioned connections.

17. The combination with a typewriter carriage,'of an escapement mechanism for said typewriter carriage, means, including numeral keys, for controlling the action of said escapement mechanism, a totalizer, a driving train from said numeral keys to said totalizer having a point of interruption, a make-and-break connection for said point of interruption, means for operating said make-and-break connection from said es-= capement mechanism, connections enabling said numeral keysto control the operation of its said make-and-break connection by said escar of interruption, means for operating said malreand-break connection from said escapement mechanism, connections enabling said numeral keys to control the operation of said inake-and-break connection by said escapement mechanism, a lock for preventing the operation oi said last-mentioned connec tions, computing zone-controlling means governed from said carriage for releasing said lock when in a computing zone, and manually-operated controlling mechanism for silencing the control of said loci: from said carriage.

l9. The combination with a typewriter carriage, of numeral lreys for controlling the action oi. said carriage, a totaliser, a driving train from said numeral keys to said totaliaer, including an actuator, means for brealring said actuator, so as to interrupt the con nection between said numeral keys and said totalizer, a shifter for breaking said actu ator, computing Zone-controlling means ried by said carriage, and means for open ating said shifter from said computing zonecontrolling means.

20.. The combination with a typewriter.

carriage, oi? numeral lreys for controllinp, the action of said typewriter carriage, a totaliser, a driving; train between said numeral keys and said totalizer, a shiiter for interrupting said driving train, computing zone-controlling means carried by said car riage, connected to operate said shifter, roan ual means operating shifter to control the vit' or the driving train tween said numeral lreys and said totaliser, and connections from said manual control means for governing the said zone-controlling means.

21 The combination with typewr ter rage, of numeral keys for controlling the action of said typewriter carriage, a total a driving train from said numeral lreys to said totalizer, including an actuator, a shifter for disconnecting said actuator, a computing zone-controlling stop carried by said carriage, a controller operated by said. stop, and a linlr operated by said control er connected operate said shifter The combination with a typewr carriage, or numeral lreys for controll. action said typewriter carriage, a totalizer, a driving train from said numeral keys to said totalizer, including an actuator, a shifter "for disconnecting said actuator, a computing acne-controlling stop carried by said carriage, a controller operated by said step, a link operated by said controller connected to operate said shifter, said controller comprising a bell cranlr and a slide, and means for shifting said slide into and out t range of said stop carried by said carriage, so as to determine the activity and in activity oi the control of the driving train between ninneral lreys totalize from said. carriage.

23. 'lhe combination with a typewriter carriag'e ol means, including muneral lreys, for controlling the action of said carriage, totalizer, a driving train between said totalizer and said numeral keys, having a point of interruption, malre-and-brealr connections for said point of interruption controlled by said numeral keys, locking means for said numeral lreys, and a carriage-operated means tor bringing said connections and locle ing means into play solely when in a computing zone The combination with a typewriter car-- riage, oi means, includino' numeral keys, for controlling the action of said typewriter can riage, a totalizer, a driving train between said totaliaer and said numeral keys, having a point of interruption, enabling the drive of said totalizer from said numeral keys solely during one stroke of said numeral keys, said driving train also having a secend point of interruption for silencing the drive from said numeral lreys to said total- 1 izer, a make-and-brealr connection for said first-mentioned point of interruption con trolled from said numeral keys, and computing tone-determining means operated from said carriage for controlling the connection at said second-mentioned point or terruption and the operation of said inalieand-break connection.

:25, The combination with a totaliaer, of numeral lzeys, a driving train between said numeral lreys and said. totalizer, including a point of interruption, a link connected to said driving train to malts and break the same at the point of interruption, operating means for said linlt including a bell-crank a lever having a last and loose connection to said bell-crank, said lever being p 1 otally mounted on said linlr, and shittabie from a position where said bell-crank an idle movement relative to said lever,

thus relative to said link, to position where J said bell-cranlr has a connection to said lever, and thus to said link, a lock for preventing the sin ing oi said lever, an arm for shifting said lever, a spring forming a yielding connection between said and said lever, enabling the shi ing oif said lever by said arm when said loclt is moved to inactive position, and connections enabling the operation of said arm by said numeral keys, so as to control the make breast of said driving a between said numeral lreys and said when said loclr inactive.

26. The combination with a totalizer, numeral keys, a driving train between said numeral lreys and said totalizer, including" a point of interruption, a linlr connected to said driving train to malts brealr the same at the point of interruption, operating means for saidflink including a bell-crank and a lever having a fast and loose connection to said bell-crank, said lever being pivotally mounted on said link, and shiftable from. a position where said bell-crank has an idle movement relative to said lever, and thus relative to said link, to ,a position where said bell-crank has a rigid connection to said lever, and thus to said link, a lock for preventing the shifting of said lever, an arm for shifting said lever, a spring forming a yielding connection between said arm and said lever, enabling the shifting of said lever by said arm when said lock is moved to an inactive position, connections enabling the operation of said arm by said numeral keys, so as to control the make and break: of said driving train between said numeral keys and said totalizer when said lock is inactive, means for operating said bell-crank from said numeral keys, and com puting zone-controlling means carried by said carriage, connected to operate said lock, so as to place the drag of said make and break of said driving train on said numeral keys solely when in a computing zone.

27. The combination with a typewriter carriage, of means, including numeral keys, for controlling the action of said typewriter carriage, a totalizer, a driving train between said numeral keys and said totalizer, fullstroke locks for said numeral keys, interlocks for said numeral keys, silencing means for saiddriving train, and means controlled from said carriage for automatically relieving said numeral keys of the burden of operating said driving train, said interlocks and said full-stroke locks when said carriage is in non-computing zones.

28. The combination with a typewriter carriage, of means, including numeral keys, for controlling the action of said fiarriage, a totalizer, a driving train between said numeral keys and said totalizer having a point of interruption and a point of disconnection, numeral-key-opelated means for making and breaking said driving train at said point of interruption during an operation of said numeral keys, means for disconnecting said driving train at said point of disconnection, and carriage-controlled means for silencing said make-and-break means and bringing into pla said disconnecting means when said carriage is in noncomputing zones.

29. The combination with a carriage, of numeral keys, numeral-key-controlled computing mechanism, numeral-key-controlled escapement mechanism for said carriage, full-stroke mechanism for said numeral keys, connections whereby said full-stroke mechanism is rendered efi'ective in one direction or the other by said escapement mechanism, and carriage-controlled means for rendering said full-stroke mechanism ineffective.

30. The combination with a typewriter carriage, of computing mechanism, means, including numeral keys, for controllingthe action of said typewr ter carriage and of said computing mechanism, a lock for preventing the operation of more than one numeral key at a time, carriage-controlled means to render said lock effective or inefl'ective, and means to render said carriage-controlled means inefi'ective.

31. The combination with a carriage, of numeral keys, numeral-key-controlled computing mechanism, numeral-key-controlled escapement mechanism for said carriage, mechanism to insure'a full down stroke of said numeral keys, and means controlled by the escapement mechanism to render said full-stroke mechanism ineifective at the end of the down stroke of a depressed key, so 35 as to permit the key to rise.

FREDERICK A. HART. Witnesses:

F. GARLANDTUCKER, ARTHUR A. JOHNSON. 

